The expansion of telehealth has improved access to care, but concerns have been raised about potential for diagnostic errors. In this study, researchers used the Safer Dx Trigger tool framework to develop an electronic trigger to identify delayed diagnoses during primary care telehealth visits at a Veterans Health Affairs (VHA) facility. Applying the trigger tool to a random sample of 100 telehealth visits with a subsequent unplanned visit (emergency department, hospital or primary care) yielded a positive predictive value of 11%.